The Arc'teryx Men's Sidewinder AR Jacket. This waterproof, windproof & durable GORE-TEX Pro Shell* jacket has a new shaping & forward-leaning articulation that increases its performance & comfort. It also has a helmet-compatible hood, an adjustable powder skirt, laminated pit zippers, Tiny GORE seam tape* & a Recco reflector. Features DWR finish, micro-seam allowance (1.6 mm), tiny GORE seam tape (13 mm), GORE-TEX three-layer construction, one-hand adjustable drawcords, generous cut for easy layering, helmet compatible Stow Hood, laminated chin guard, Water Tight external zippers, powder skirt with gripper elastic & snap closure, Recco reflector. Glossary DWR: A DWR fabric will bead up water on its surface to stop it soaking into the fibres. This maintains breathability & shortens drying times. Gore-Tex Pro Shell:GORE'S extremely waterproof & durable membrane is laminated onto fabrics & used to deliver exceptional waterproofing & breathability. RECCO: A reflector that is discreetly placed in a piece of clothing. It forms the passive element of an avalanche search system & enables the fast location of avalanche victims. Recco is currently being used by rescue organisations in more than 440 ski resorts all over the world.